<HTML><HEAD><TITLE>difference(?Set1, ?Set2, ?Set3)</TITLE>
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<H1>difference(?Set1, ?Set2, ?Set3)</H1>
Set3 is the difference of the integer sets Set1 and Set2
<DL>
<DT><EM>Set1</EM></DT>
<DD>a set, set variable or set expression
</DD>
<DT><EM>Set2</EM></DT>
<DD>a set, set variable or set expression
</DD>
<DT><EM>Set3</EM></DT>
<DD>a set, set variable, free variable or set expression
</DD>
</DL>

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